CAJ | 학술논문

基于微极流体理论和微极固体弹性理论,研究了纵向位移波通过微极流体中微极弹性板时的纵向位移波、耦合波一和耦合波二等三种微极弹性波的反射和透射特性.理论分析和数值计算结果表明:在一般情况下,各种反射和透射波的振幅比是入射波的入射角、频率和介质材料特性的函数；正入射时只有纵向位移波穿过固体板,而不存在其它波的传播；掠入射时仅有入射波沿界面传播而无反射、折射和透射现象发生.文章同时还讨论了反射、折射和透射系数随入射角的变化规律.
기우미겁류체이론화미겁고체탄성이론,연구료종향위이파통과미겁류체중미겁탄성판시적종향위이파、우합파일화우합파이등삼충미겁탄성파적반사화투사특성.이론분석화수치계산결과표명:재일반정황하,각충반사화투사파적진폭비시입사파적입사각、빈솔화개질재료특성적함수；정입사시지유종향위이파천과고체판,이불존재기타파적전파；략입사시부유입사파연계면전파이무반사、절사화투사현상발생.문장동시환토론료반사、절사화투사계수수입사각적변화규률.
Based on micropolar fluid theory and micropolar solid elasticity theory,reflection and transmission characteristics of three kinds of micropolar elastic waves involving longitudinal displacement wave and two coupled waves,are studied when incident longitudinal displacement plane wave propagates through micropolar elastic solid plate in micropolar fluid.Theoretical and numerical analytical results reveal that in general the amplitude ratios of various reflected and transmitted waves are functions of angle of incidence,frequency of the incident wave and of the material properties of the medium through which they travel.At normal incidence,the reflection and transmission of only longitudinal waves take place and no coupled transverse wave is found to reflect or transmit.At grazing incidence,no reflection or transmission phenomena take place and the same wave propagates along the interface.The change rules of the reflection waves and refraction waves amplitudes varied with incident angle are also discussed.